Lifting-jack.



` D. ELEY.

LIFTINGJACK.

APPLICATION Flu-:n FEB. s, 1918.

1 ,272,237. Patented July 9, 1918.

2 SHEETS-SHEET 1.

lllll Il I m 7 gli, 3f? 7 D. ELEY.

LIFTINGJACK.

APPLICATION FILED rf.6.191.

Patented July 9, 191,8.

DAVID ELEY, OF FUNK, OHIO.

LIFTING-JACK.

Specification of Letters Patent.

Patented July 9', 1918.

Application filed February 6, A1918. 1 Serial No. 215,582.

To all whom z'may concern Be it; known that; I, DAVID Enna?, a citizen of; ,thezUnited' Statesfresiding at Funk in the county otrWayne and State of Ohio, haveinventedfa. new anduseful VLifting- Jac-k, .ot,whichithetollowing is a speciiication.

This invention'relatesxto lifting jacks, the objectfbe'fngeto. construct a simple?, inexpensive andcdurable :device ofthis -kind with means for positively Areversingthe ldirection of anovementiothe lifting kbar of the said 'ack.

J Another-)Objectis toconstruct a jack in which: the...several parts can beassembled and` disassembled without: the nse of tools.

Withl these; objects in .view theA invention consists in'theauiovel constructibnand arrangement not. parts, hereinafter described, illustrated in :the .accompanying drawings, and particularly pointed out in the append- .ed claims, it bei-ng Iunderstood lthat various ch-anges in -thexiornnV proportions, size rand minori details of construction may .be lmade -withi'nwthe scope not athaappended claims, withouttdeparting:fronrfthe spirit or sacriicing any ofthe ladvantages of the: inventiona:

In'the drawingss Figure-1 is'a side*elevatioirofmy;'jack of thesideoppositeathe one to whichi theoperatiirg handle is connected. f

Fig. f 2 iis a vertical: transverse sectional view with *l .a :part: of= ythe A operating lever broken .away .and :showing the 1 p awls 2 and `cooperating springin .position Vfor lifting.

Fig. 3 isa horizontaltsection .taken on the line 33, of;Fig.

Fig.V 41 isa viewsimilar to Fig. 2,-but with the pawlsand'ftheir cooperating :springfin position for lowerin-gnv Fig. 5 is a detail perspective of .thelever memben Fig. 6 is a .detaivllperspective of. one `of the pawls.`

Fig-, 7 is a detail 7-7,:Fig.12.. Similar numerals otreference `indicate corresponding parts throughout the lseveral igures of the drawing..

Theibaseamemberzor standard 1 of my jack is composed of a single. casting and has an. oli-setviportion' at oneside as clearly shownin Fig-` 1. A horizontal opening 3 is formed' through l:the side walls .of the-,cast-V ing 'andwinl approximately-1 'the centerv of the sectional view on line on-the rack bar 5 upon its right and `left sides respectively, the said series of teeth` 6 being arranged in staggered relation tothe series of teeth 7 upon-:the opposite side of the bar. A lever member 8 is biurcated as shown Ain-lld`l`ig.. 5 to form arms 9 and 10. Formed in the oit-'set-v portion 2 of the casting, at approximately thc/'vertical and horizontal center thereof is a round aperture 11 which is adapted to receive a studf12 Aformed upony the4 member 10 of the lever and at a point in direct horizontal alinement with thel stud lfisa round aperture-11 in the member 9, which is adapted to Areceive a stud 15 carried by theI outside of theeasting 1.` The studs 12and 15 coperating with the apertures 11 and 141 form a-pivot for the lever-8 upon'lwhich the said lever is adapted to bev'rocked. Horizontally alined apertures 16 .drilled through: the bars y9 and 10 ata pont=vadjacent the freeA ends are adapted to receive aapin 17 -upon which is mounted anengagingpawl 18.' Theupper end of the said pawl=- iswidened4 to form 'a shouldery 19, which fshou'lder is spaced slightly above the upper face of the arm 10 and: is of 'approximately the width of the said arm. Opposite the apertures 16 and spaced the same distanceV from the' stud 12 is a pair of apertures 20-i1rthe arms 9 and 107 which apertures'receive a pin 21 which carries a' pawl Q2 similarv to theupawl v18, but with Lits shoulder 24: upon the opposite side of theepawlto the shoulderv19 upon the pawl 18 and it will therefore be seen'thateach of the shoulders' 19 and 21 :extendsover `the arm 10. A tail portion 25 isformed on each of the pa'wls and 4is for a :purpose hereinafter to be set forth.,Y It willbe Anoted'pthat thefpawlsare mounted yupon'the pinsrlG and 21 in such a way that theconstant .tendency of the upper or engagingvportion of each l adapted to receive a handle 34 to give an increased leverage in operating the Jack.

In assembling my jack the arm 10 is 1nserted through the opening 3 until the stud 12 on the arm 10 and the aperture 14 in the arm 9 have come into register with the aperture 11 and stud l5 respectively when the lever portion 8 is moved sidewise inserting the stud 12 in the aperture 11 and the stud 15 in the aperture 14. The bar 5 is then inserted from the top, thus preventing the arms 9 and 10 from moving to withdraw the studs from their respective apertures. The pawls 18 and 22 are then positioned between the arms 9 and 10 and the pins 17 and 21 inserted and secured'by Cotter pms. It is thus seen that no tools are necessary to assemble the several parts of my jack and the disassembling may beaccomplished by withdrawing the cotter pins, removing the pawls and rack bar and sliding the lever member 8 sidewise to withdraw the studs from their respective apertures. In Fig. 2 I have shown the several parts of my jack in position to force the rack bar upwardly to lift when the lever member 8 is oscillated vertically by the handle 34. As the handle 34 reaches the limit yof its downward movement the pawl 22 will be in position to drop under one of the teeth 6 and as the handle 34 is then vmoved upwardly the engagement of the pawl 22 with the said tooth will move the rack bar 5 upwardly the distance of one tooth. y In the meanwhile the pawl 18 is being carried downwardly and as the handle 34 reaches the limit of its upward movement the said pawl 18 will be in position to drop under one of the teeth 7. It is thus seen that at each upward or downward stroke of the handle, the rack bar 5 is moved upwardly to lift the load.

Referring now to Fig. 4 the parts are seen in position to lower the rack bar 5. The operating finger 31 has been thrown to the opposite side of the pin 28 to the side which it occupies in Figs. 2 and 3, the rounded end of the said pin 28 being now turned uppermost thus forcing the leaf spring 27 to exert a pressure against the shouldersf19 and 21 of the pawls 18 and 22. The said pressure against the shoulders of the pawls by the spring 27 vcauses the upper ends of the said pawls to be swung away from the rack bar,

the ytail portions 25 upon the pawls contacting with the rack bar 5 to limit the distance which the said upper portions will be spaced from the said rack bar. VJ ust before the handle 34 reaches the limit of its upward movement the upper end of the pawl 22 will be swung into engagement with one of the teeth 6 and as the handle travels the last fraction of an inch upwardly the rack bar 5 Y will be lifted slightlyallowing the spring to throw the pawl 18 out of engagement gwith whichever one of the teeth 7 it wasV engaged on its last stroke. As the handle begins its downward travel the pawl 22 will remain in engagement with the tooth 6 which it engaged at the end of its upward stroke, thus lowering the rack bar 5 the distance of one tooth. The pawl 22 will remain in engagement with the said tooth until the handle has reached nearly the limit of its downward travel when the pawl 18, which is now moving upwardly will have engaged one of the teeth 7 and as the handle 34 travels the remaining fraction of an inch,- until it reaches the limit of its downward movement, the pawl 18 will lifty the rack bar slightly allowing the spring to disengage the pawl 22 from the tooth which it was engaging. It will thus be seen that at .each i stroke of the handle 34 the pawl 5 is dropped a notch tolower the load.

Having fully described 'myV invention,

what I claim as new and desire to securebyY aperture in horizontal alinementlwith said second aperture, a bifurcated lever, a stud carried by one of the bifurcations 0f said lever, an aperture formed in the other of said bifurcations and in horizontal alinement with the said stud carried by the said Vfirst mentioned bifurcation, said first mentioned bifurcation being adapted Vto be inserted through the said horizontal aperture in the said standard and to be moved sidewise to cause the stud upon the saidy first named bifurcation to enter the aperture in the said oE-set portion and to simultaneously cause the studv carried by said standard to enter the aperture in said second named bifurcation, a vvertical passage throughsaidstandard, a lifting bar adapted to fit within the said passage when said lever has been positioned and Vto lock said lever against removal from said standard.V

A2. In arlifting jack, a standard, a lifting bar adapted to slide vertically within said standard, a lever fulcrumed upon said standard, a pawl mounted upon said .lever at either side of said fulcrum and equi-distant Y therefrom, a series' of ratchet teeth upon. one

respective series of ratchet teeth upon the f said lifting bar being adaptedto co-actV to force the said lifting bar upwardly When the paWls to cause the said paWlS to co-act the lever is oscillated vertically upon its with their relative series of ratchet teeth to fulcrum, a sprinfr carried by the said lever, lower the lifting bar When the lever is oscill0 the said Spring being normally adapted to lated vertically upon its ulcrum.

5 lie out of engagement With the said paWls In testimony that I claim the above, I

and means carried by the said lever for forchave hereunto subscribed my name.

ing the said spring into engagement with DAVID ELEY.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

